Compress a WEBP

Reduce WEBP file size with a quality slider and real, measured savings.

Reduce the size of an existing WEBP file by re-encoding it at a lower quality. Every run encodes for real and reports the measured byte count of the file you download.

Processed in your browser

Drop your image here

or choose an image from your device

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Accepts WEBP images · No fixed size limit — we adapt to what your device can handle. Very large files may take longer or show a warning.

About WEBP Compressor

How WebP compression works here

The WEBP is decoded to pixels and re-encoded at the quality you choose. Because the source is usually already lossy, each additional pass adds some permanent damage — so it is better to compress once from the best available original than to run the same file repeatedly.

Choosing a quality value

75–85 covers most web use. Go to 90 or above for images shown large or containing text; below 70 you will start to see banding in gradients and halos along edges. If the output comes out larger than the input, the result panel labels it honestly rather than claiming a saving.

Settings and output

The quality slider

The only control. It sets the WebP encoder's quality value directly — there's no separate lossless mode here, so even a value of 100 is still a fresh lossy encode of your source.

When to use it

Trimming WebP assets that are still too heavy for a fast-loading page.
Meeting an upload size limit without changing format.
Reducing bandwidth for image-heavy galleries.

Limitations to know

Re-compressing an already-optimised WebP may save little or nothing.
Compression is lossy and cannot be undone.

Common problems and fixes

The result panel says 'Larger', not 'Saved'.

That means your source WEBP was already encoded more efficiently than the quality you picked would produce. Try a lower quality value, or keep the original file.

The image looks noticeably worse after compressing.

You've gone below the range the content can tolerate. Raise the quality slider back up, or start over from a less-compressed original if you still have one.

Can I compress the same file several times to get it smaller?

You can, but each pass adds permanent damage on top of the last. It's better to go back to the original and pick a lower quality value in a single pass.

How to use it

1Drop a WEBP file into the upload area.
2Set the quality slider. The browser's WebP encoder is lossy at every value here, so even 100 is a re-encode rather than a copy.
3Press Compress and read the measured before/after bytes.
4Download if the saving is worth it — if the panel says 'Larger', your source was already more aggressively compressed than the setting you chose.

Frequently asked questions

My WEBP is already small. Is there anything left to squeeze?

Often not much. WebP is already 25–35% denser than JPG at the same visual quality, so a second pass mostly costs detail. Reducing dimensions is usually the better lever.

Does compressing a lossless WEBP turn it lossy?

Yes. The output here is encoded with a quality value, so a lossless source becomes a lossy file. Keep the original if you need to edit it later.

What if my browser can't encode WebP?

Support is checked with a real test encode before anything runs, not by sniffing the user agent. If encoding genuinely isn't available you get a clear message instead of a mislabelled file.

Is transparency preserved when compressing?

Yes — lossy WebP supports an alpha channel, so transparent areas survive the re-encode.

Related guides

Not sure which settings this image needs? Run it through the image optimization tool to get an optimization score and automatic format, quality and size choices.